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<div>　　<strong><a href="http://www.daizhiyu.cn/Products-32738114.html" target="_blank">空氣負(fù)離子檢測儀</a></strong>具有殺菌功能，除塵滅菌，減輕空氣污染的危害、環(huán)保健康看得見。那么在選擇購買空氣負(fù)離子檢測儀的時(shí)候，應(yīng)該著重考慮以下幾個(gè)問題。<br /> </div><p align="center"><img src="http://img69.chem17.com/9/20191106/637086511305130700310.png" width="490" height="366" align="middle" alt="" /></p><div>　　1.抽氣速率<br /> </div><div>　　是指儀器所用的抽氣機(jī)氣流速率，和儀器的取樣量直接相關(guān)。取樣量大的靈敏度一般較高，適宜于較大空間范圍的空氣進(jìn)行測試。取樣量曉得靈敏度較低，也較易受外界氣流干擾，但他同時(shí)對(duì)被測量對(duì)象影響也較小。<br /> </div><div>　　2.測量對(duì)象<br /> </div><div>　　空氣負(fù)離子檢測儀的測量對(duì)象，大體上可分為人造離子源和自然離子源。人造離子源主要有各種電暈式離子發(fā)生器、水激式負(fù)離子發(fā)生器及放射源離子發(fā)生器等。自然離子源，主要有地表放射性物質(zhì)、放射性氣體、宇宙線、天然瀑布及添加負(fù)離子的材料等。<br /> </div><div>　　3.測量范圍<br /> </div><div>　　根據(jù)項(xiàng)目的實(shí)際需要，選擇空氣負(fù)離子檢測儀檢測離子濃度上限，即zui大檢測量程。針對(duì)目前各種項(xiàng)目的需求，空氣負(fù)離子檢測儀檢測上限只要達(dá)到109個(gè)/cm3就足夠了。<br /> </div><div>　　4.靈敏度<br /> </div><div>　　所需要的離子濃度zui小分辨率，即檢測儀的靈敏度。如果在實(shí)際實(shí)驗(yàn)過程中，要求進(jìn)行空氣離子濃度檢測，則要求選用20個(gè)/cm3儀器，否則就會(huì)出現(xiàn)由于靈敏度不夠而影響測量結(jié)果的情況。<br /> </div><div>　　5.響應(yīng)時(shí)間<br /> </div><div>　　是指被測量的其他從開始被抽入收集器到儀器顯示數(shù)據(jù)指示穩(wěn)定所需的時(shí)間。在野外測試或被測試的離子源存在著較大的波動(dòng)時(shí)，選用相信時(shí)間長一些的儀器。但如果對(duì)于一些變化迅速的項(xiàng)目，就需要用到響應(yīng)時(shí)間較短的儀器。一般的情況下，響應(yīng)時(shí)間可在5-20S的范圍內(nèi)選擇。<br /> </div><div>　　6.測量誤差<br /> </div><div>　　主要是離子濃度測試誤差，離子濃度測試誤差主要是由微電流計(jì)的誤差和抽氣速率誤差組成。前者一般在5%左右，后者在10%左右，因此離子測量儀的誤差大致在15%-20%左右。<br /> </div> <div class="mha2zlz0wgq" id="news_sx"><li id="mha2zlz0wgq" class="sx_left">上一篇：<a href="/Article-2042465.html">涂料負(fù)離子檢測儀</a> <br />下一篇：<a href="/Article-2022212.html">日本負(fù)離子檢測儀COM3010pro</a></li></div> </div> </div> </div> </div> <div id="mha2zlz0wgq" class="clear"></div> <div class="mha2zlz0wgq" id="footer"> <div id="mha2zlz0wgq" class="footernr"> <div id="mha2zlz0wgq" class="footersub1"> <p>工作時(shí)間</p> 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